<!--
{
  "availability" : [
    "iOS: 11.0.0 -",
    "iPadOS: 11.0.0 -",
    "macCatalyst: 13.1.0 -",
    "macOS: 10.13.0 -",
    "tvOS: 11.0.0 -",
    "visionOS: 1.0.0 -",
    "watchOS: 4.0.0 -"
  ],
  "documentType" : "symbol",
  "framework" : "AVFAudio",
  "identifier" : "/documentation/AVFAudio/AVAudioEngineManualRenderingMode",
  "metadataVersion" : "0.1.0",
  "role" : "Enumeration",
  "symbol" : {
    "kind" : "Enumeration",
    "modules" : [
      "AVFAudio"
    ],
    "preciseIdentifier" : "c:@E@AVAudioEngineManualRenderingMode"
  },
  "title" : "AVAudioEngineManualRenderingMode"
}
-->

# AVAudioEngineManualRenderingMode

The two modes for manual rendering.

```
enum AVAudioEngineManualRenderingMode
```

## Overview

By default, the engine connects to an audio device and automatically renders in real time. You can configure it to operate in manual rendering mode, where it doesn’t have a connection to an audio device and renders in response to requests from the client.

## Topics

### Constants

[`AVAudioEngineManualRenderingMode.offline`](/documentation/AVFAudio/AVAudioEngineManualRenderingMode/offline)

An engine that operates in an offline mode.

[`AVAudioEngineManualRenderingMode.realtime`](/documentation/AVFAudio/AVAudioEngineManualRenderingMode/realtime)

An engine that operates under real-time constraints and doesn’t make blocking calls while rendering.


---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)